Improvement in spike-extractors



Patented'JuIy16,1872.

FIG

IN VEN T O R M dalzwed WITNESSES UNITED STATES PATENT O EIoE.

NATHAN ADAMS, or ALTOONA, PENNSYLVANIA.

IMPROVEMENT IN SPIKE-EXTRACTORS.

Specification forming part of Letters Patent No. 128,996, dated J uly 16, 1872.

Specification describing certain Improvements in Machines for Drawing Spikesand Bolts, invented by NATHAN ADAMS, of Altoona, in the county of Blair and State of Pennsylvania.

My invention relates to the combination of a lever and toggle-catch with a fulcrum-box having inclines which support the fulcrum-pins of the lever-the inclines being so constructed and arranged as to admit of an automatic changing in the position of the fulcrum-pins as the grasping points of the levenand togglecatch ascend in the withdrawal of the bolt, as hereinafter fully described.

Figure 1 is a plan view of the machine placed on a piece of timber. Fig. 2 is a side elevation of the same.

Like letters in both figures indicatcthe same parts.

'A is a piece of timber, and B a bolt which is being withdrawn. 0 is a box open at bottom and top. The box I prefer making of steel. The side pieces a a are connectedat their ends by means of the screw-bolts b b. D is alever which is provided with a fulcrumpin, E, its ends d d projecting outward from the sides of the lever and connecting with in' clined slots 0 e in the sides of the box 0. F is a toggle-catch hung on the bolt b opposite the lever, so that when the box is placed over a bolt, B, and the grasping-points f and f of the lever and toggle-catch are caught against opposite sides of the bolt, as represented in the drawing, by the manipulation of the lever as its point f rises in the withdrawal of the bolt, the point f of the toggle-catch also rises, the catch turning freely on the bolt b, and the projecting ends d d of the fulcrum-pin E automatically changing their position in the slots 0 e in accommodation thereto. When the point f of the lever is released from the bolt to take a new grasp, the catch falls down to its lower position, as represented, to act with the lever in a further withdrawal of the bolt. By a continued repetition in the up and-down movements of the lever and toggle-catch, which may be made with great rapidity, as the movements of the toggle-catch are automatic with those of the lever, the bolt or spike is withdrawn.

I claim as my invention- The fulcrum-box 0, having inclined slots e e, in combination with-the lever D and togglecatch F, substantially in the manner and for the purpose above described.

. NATHAN ADAMS.

Witnesses STEPHEN BEWLEY, G. L. MYERS. 

